Table 38. Construction limitations: block revetments and 

 subaqueous applications. 





CATEGORY 



A 



B 



C 



Block Revetment 1 









Precast Cellular Block 2 









Steepest Slope: 









Individual Blocks 



IV on 2H 



IV on 3H 



NA 3 



Cabled Blocks'* 



IV on 1.5H 



IV on 2H 



NA 



Max. block weight 



>3.1 kPa 



3.1 kPa 



NA 



Interlocking Concrete Block 2 









Steepest slope 



NA 



IV on 2H 



IV on 2.5H 



Min. gravel thickness 









Above filter 



NA 



15.2 cm 



15.2 cm 



Max. block weight 



NA 



>3.1 kPa 



3.1 kPa 



Subaqueous Applications 5 









Steepest Slope 



IV on 15H 



IV on 15H 



IV on 15H 



Stone Adjacent to Geotextile: 









Max. stone weight 



8.9 kN 



8.9 kN 



3.3 kN 



Min. drop through water 



1.5 m 



1.5 m 



1.5 m 



Max. stone weight 



>13.3 kN 



>13.3 kN 



>3.3 kN 



Max. drop height 



placed 



placed 



placed 



Subsequent Stone Layer (s) 









Max. stone weight 



no limit 



no limit 



no limit 



Max. drop height 



NCP 6 



NCP 



NCP 



Stronger principal direction (SPD) and seams of the geotextile should be 



perpendicular to the shoreline. 

 2 With flat base. 

 3 Not applicable. 



^Precast cellular blocks cabled together in a horizontal plane. 

 5 No limit to the number of underlayers between the armor and the geotextile. 

 6 As in normal construction practice: the geotextile does not require 



special limitations in these layers. 



292 



